Two Vertical Plane Mirrors Are Joined at a Right Angle

question 59

Multiple Choice

Two vertical plane mirrors are joined at a right angle. A horizontal beam of light is shone on one of the mirrors at an angle of incidence of 22 degrees, such that the reflected ray strikes the other mirror. What is the angle of incidence of the beam that strikes the second mirror?

• A) 23°
• B) 68°
• C) 43°
• D) 22°

---

Definitions:

Individual Sales

Individual Sales refer to transactions and revenue generated from selling products or services on a per-unit or single-transaction basis.

Matching Principle

An accounting principle that requires expenses to be matched with the revenues they help to generate in the same accounting period.

Expenses

Costs incurred during the operation of a business, such as rent, salaries, and utilities, required for generating revenue.

Revenue

The overall earnings accrued from transactions involving goods or services at the heart of a business's primary operations.